# vsftpd userlist
# If userlist_deny=NO, only allow users in this file
# If userlist_deny=YES (default), never allow users in this file, and
# do not even prompt for a password.
# Note that the default vsftpd pam config also checks /etc/vsftpd/ftpusers
# for users that are denied.
FtpUser1

# service vsftpd restart

#

# service vsftpd restart && service rsyslog restart

# tail -fn0 /var/log/xferlog /var/log/vsftpd.log

Logs schema graf diagram. Flowchart start read from right to left (like manga).